ADWA AD1020 User manual

USER MANUAL

AD1000 and AD1020

pH/mV/ISE/Temperature

Bench Meters

w w w . a d w a i n s t r u m e n t s . c o m

1

Dear Customer,

Thank you for choosing an Adwa product.

Please read carefully this manual before starting operations.

This instrument is in compliance with the EMC directive

2004/108/EC and its standards, and Low Voltage

Directive 2006/95/EC and its standards for electrical equipments.

For additional technical information, please e-mail us at

[email protected].

2

TABLE OF CONTENTS

Introduction ............................................................... 4

Technical Data.......................................................... 6

Front and Rear Panels .............................................. 8

Operational Guide .................................................. 12 pH Calibration ........................................................ 19

Relative mV Calibration ......................................... 29

ISE Calibration (AD 1020 only) ............................ 30

Good Laboratory Practice ...................................... 35

Setup ....................................................................... 42

Logging/Storing ...................................................... 50

Hold ........................................................................ 58

Printing ................................................................... 59

Temperature Calibration

(for technical personnel only)

64 mV Calibration

(for technical personnel only) .................

66

Analog Output ........................................................ 68

PC Interface ............................................................ 68 pH Electrode Conditioning & Maintenance. .......... 69

Troubleshooting Guide ........................................... 72

Electrodes, Probes and Solutions ........................... 74

3

INTRODUCTION

AD1000 and AD1020 are professional bench meters

with ranges for pH, ORP (Oxidation Reduction Potential), ISE (AD1020 only) and temperature measurements. Relative mV readings are also provided.

Main features include:

• Up to 5-point calibration with 7 memorized buffers

(pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01 & 12.45) and two custom buffers

• Calibration time-out alarm

• pH calibration using buffers with 0.001 resolution

• pH reading with manual or automatic temperature compensation

• Log-on-demand (up to 50 samples) and automatic logging (up to 1000 samples)

• Two selectable alarm limits

• User selectable logging interval mode

• Connection to an external serial printer with the following specifications:

• at least 16 characters / line

• baud rate 9600

• 9-pin RS232 input

4

• Large easy-to-read LCD showing pH or ISE

(AD1020 only), mV and temperature readings simultaneously, together with graphic symbols

• HOLD feature to freeze the stable reading on the

LCD

• GLP feature to view last calibration data for pH,

ISE and relative mV

• PC interface

Both models are supplied complete with:

• AD1131B refillable pH electrode with glass body,

BNC connector and 1 m cable

• AD7662 stainless steel temperature probe 1 m cable

• pH 4.01 and pH 7.01 calibration buffers (20 ml sachet each)

• Electrode holder

• 12 Vdc power adapter

• User manual

5

TECHNICAL DATA

Range

-2.00 to 16.00 pH / -2.000 to 16.000 pH

±2000 mV

0.001 to 19999 ppm (AD1020 only)

- 20.0 to 120.0°C (- 4.0 to 248.0°F)

Resolution

0.01 pH / 0.001 pH

0.1 mV

(±999.9 mV) / 1 mV (outside)

(0.001 to 9.999) ppm (10.00 to 99.99)

0.001 ppm

0.01

0.1

1 ppm (100.0 to 999.9) ppm (1000 to 19999)

(AD1020 only)

0.1°C (0.1°F)

Accuracy

(@25°C/77°F)

±0.01 pH / ±0.002 pH

±0.2 mV up to ±699.9 mV

±0.5 mV up to ±999.9 mV

± 2 mV outside

±0.5% f.s.

ISE (AD1020 only)

±0.4°C (±0.7°F) (excluding probe error)

Relative mV Offset

± 2000 mV

pH Calibration

Up to 5 point calibration, with 2 custom and 7 standard buffers

(pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45)

6

ISE Calibration

(AD1020 only)

Up to two-point calibration,

5 standard solutions available

(0.1, 1, 10, 100, 1000 ppm)

Temperature

Manual or automatic,

Compensation

-20.0 to 120.0°C (-4.0 to 248.0°F)

pH Electrode

Temperature Probe

AD1131B

AD7662

Logging Interval

5 seconds to 180 minutes

Printer

PC Interface

Analog Output

Input Impedance

Environment

Power Supply

Dimensions

Weight

External serial printer

USB port

± 2000 mV

10

12

Ohm

0 to 50°C (32 to 122°F)

RH max. 95% non-condensing

12 Vdc adapter

230 x 180 x 50 mm

1.8 kg

7

FRONT AND REAR PANELS

Front Panel

8

Rear Panel

1. Power adapter socket

2. Reference input socket

3. BNC connector for pH, ORP or ISE electrodes

4. Temperature probe socket

5. Analog output sockets

6. USB port for PC connection

7. RS232 port for external serial printer connection

9

Keyboard

1. HOLD key, to freeze reading on the LCD

2. PRINT key, to obtain a printout or cancel printing

3. PAPER key, to pull out the external printer paper

4. ON/OFF key, to turn the instrument ON and OFF

5. Left arrow key, to toggle between parameters while in MEM RCL or SETUP mode (backwards), to toggle between absolute mV and temperature while in relative mV mode and between pH buffer and temperature while in pH calibration mode

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6. Up arrow key, to manually increase the value of temperature or other parameters

7. CLEAR key, to clear calibration or logged data

8. RANGE key, to select measurement unit or switch focused data

9. SHIFT key, to activate the second function key

10. NUM LOCK key, to activate numerical keys (0 to 9, ±)

11. Down arrow key, to manually decrease the value of temperature or other parameters

12. MEM RCL key, to view logged data

13. CFM/GLP key, to confirm values and to display

GLP (Good Laboratory Practice) information

14. STORE key, to store measured data

15. CAL/SETUP key, to enter/exit calibration mode and to enter/exit SETUP mode

16. INTVLOG key, to start/stop logging

17. Right arrow key, to toggle between parameters while in MEM RCL or SETUP mode (forwards), to toggle between absolute mV and temperature while in relative mV mode and between pH buffer and temperature while in pH calibration mode

11

Note: To select second function, press first SHIFT and

then the desired key. The SHIFT tag will appear on the LCD until the desired key is pressed.

To leave second function mode, press SHIFT again.

OPERATIONAL GUIDE

CONNECTIONS

• Plug the 12 Vdc adapter into the power supply socket.

Note: These instruments feature a non-volatile memory

to keep calibration data and all meter settings even when unplugged.

12

• Attach the pH, ORP or ISE (AD1020 only) electrode and the temperature probe to the appropriate sockets on the rear panel. For electrodes with separate reference, connect the reference to the proper input socket.

• Attach the analog output and serial cables to the connectors on the back of the instrument.

INSTRUMENT START-UP

Turn the instrument on by pressing the ON/OFF button.

All LCD tags are displayed and a beep is heard (if beep is ON) while the instrument performs a self test.

The instrument will display the date on the primary LCD and the time on the secondary LCD, and then it will enter the same measurement range as it was at power off.

13

pH MEASUREMENTS

Make sure the instrument has been calibrated before taking pH measurements.

• Press RANGE to enter pH range.

P ress RANGE again to change the pH measurement resolution.

• Immerse pH electrode tip and temperature probe approximately 4 cm into the solution to be tested. Allow for the electrode to stabilize and put the temperature probe tip as close as possible to the pH electrode.

• The pH reading is displayed on the primary LCD and the temperature value on the secondary LCD.

• If measurements are taken successively in different samples, it is recommended to rinse the electrode thoroughly with deionized or tap water and then with some

14

of the next sample. This will prevent cross contaminations and condition the electrode before immersing it into the solution to be tested.

• The pH reading is affected by temperature. In order to measure the pH accurately, the temperature effect must be compensated for. To use the ATC (Automatic

Temperature Compensation) capability of the instrument, connect the

AD7662

temperature probe, immerse it into the sample as close as possible to the pH electrode and wait for a few seconds.

• If the sample solution temperature is known, MTC

(Manual Temperature Compensation) can be performed by disconnecting the temperature probe. The display will show the default temperature of 25°C (or

77°F) or the last temperature reading with the °C (or

°F) tag blinking.

• The temperature can be adjusted using the arrow keys

(from -20.0°C to 120.0°C or from -4.0°F to 248.0°F).

15

ORP (mV) MEASUREMENTS

Oxidation-reduction potential (REDOX) measurements provide the quantification of the oxidizing or reducing power of the tested sample.

To correctly perform a redox measurement, the surface of the ORP electrode must be clean and smooth.

• Press RANGE to enter the mV range.

• Immerse the ORP electrode tip 4 cm into the solution to be tested and wait a few seconds for the reading to stabilize.

• The instrument displays the mV reading on the primary LCD and the temperature on the secondary LCD.

• If reading is out of range, the closest full-scale value will blink on the primary LCD.

16

RELATIVE mV MEASUREMENTS

To enter relative mV mode, press RANGE. The relative mV reading will be displayed on the primary LCD and the current temperature value on the secondary LCD.

Note: Press the right or left arrow key to toggle between temperature and absolute mV reading on the secondary LCD.

The relative mV reading is equal to the difference between the absolute mV input value and relative mV offset established in the relative mV calibration.

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ION MEASUREMENTS (AD1020 only)

• P ress RANGE to enter the ISE measurement mode.

• Immerse the ISE electrode tip 4 cm into the solution to be tested and wait a few seconds for stable reading.

• The instrument displays the ppm reading on the primary LCD and the temperature on the secondary LCD.

18

TEMPERATURE MEASUREMENTS

Connect the

AD7662

temperature probe to the appropriate socket on the rear panel.

Immerse the temperature probe into the solution and allow the reading to stabilize.

Notes:

• The temperature can be displayed in Celsius (°C ) or in Fahrenheit degree (°F). See “Setup” section for details.

• The temperature probe must be measured in the same sample together with the pH or ISE electrode.

pH CALIBRATION

The instrument should be recalibrated:

• Whenever the pH electrode is replaced

• At least once a week

• After testing aggressive chemicals

• If the CAL DUE message is blinking during measurement

PREPARATION

Pour small quantities of the buffer solutions into clean beakers. If possible, use plastic beakers to minimize any

EMC interferences.

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For accurate calibration and to minimize cross-contamination, use two beakers for each buffer solution: the first one for rinsing the electrode and the second for calibration.

If you are measuring in the acidic range, use pH 4.01 or

1.68 as second buffer. If you are measuring in the alkaline range, use 10.01/9.18 or 12.45 as second buffer.

For extended range measurements (acidic and alkaline), perform a five-point calibration by selecting five of the available buffers.

PROCEDURE

If 0.001 pH resolution is selected, each selected standard buffer value can be updated accordingly with the value of the production lot certificate at 25°C (77°F).

From calibration mode, when a standard pH buffer with

0.001 resolution is selected, press SHIFT and then

SETUP. The buffer value will start blinking and it can be changed within a ±0.020 pH window using the arrow keys.

The instrument allows to choose among 7 memorized pH buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) and 2 custom buffers.

Custom buffers allow the user to calibrate using a solu-

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tion with a pH value different from a standard one. Up to two custom buffers can be set through the setup menu.

The custom buffer value can also be changed within a

±1.0 pH window around the set value.

For accurate measurements it is recommended to perform a five-point calibration. However, at least a twopoint calibration is suggested.

The instrument will automatically skip the buffers already used and require a minimum difference of 0.2 pH unit between two buffers used for calibration.

A new calibration will override existing stored calibration data. The slopes adjacent to the calibration points will be reevaluated.

If the new calibration point has no correspondence in the existing stored calibration data, it is simply added or the instrument will ask which buffer will be replaced by the current one.

If at least a two-point calibration has been performed and an offset correction of the electrode is desired, keeping unchanged the existing slopes, perform a one-point calibration selecting the “OFFS” option in the setup menu. If the “Pnt” option is selected, the slopes adjacent to the calibration points will be reevaluated.

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FIVE-POINT CALIBRATION

• Immerse the pH electrode and the temperature probe approximately 4 cm into a buffer solution of your choice (pH

1.68, 4.01, 6.86, 7.01, 10.01, 12.45, custom buffer 1 or 2, if set) and stir gently.

The temperature probe should be close to the pH electrode.

• Press CAL and the instrument will display the measured pH on the primary

LCD and the “7.01 pH” buffer on the secondary LCD, together with CAL and

“Cal Point 1” tags.

• If necessary, press the up and down arrow keys to select a different buffer value.

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• The hourglass tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer, the CFM tag appears. Press the CFM key to confirm.

• The calibrated value is then displayed on the primary

LCD and the secondary LCD will display the second expected buffer value, together with CAL and “Cal

Point 2” tags.

• After the first calibration point is confirmed, immerse the pH electrode and the temperature probe approximately 4 cm into the second buffer solution and stir gently. The temperature probe should be close to the pH electrode.

• If necessary, use the arrow keys to select a different buffer value.

• The hourglass tag will blink on the LCD until the reading is stable.

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• When the reading is stable and close to the selected buffer, “CFM” tag appears.

• Press CFM key to confirm. The calibrated value is then displayed on the primary LCD and the secondary LCD will display the third expected buffer value.

• After the second calibration point is confirmed, immerse the pH electrode and the temperature probe approximately 4 cm into the third buffer solution and stir gently. The temperature probe should be close to the pH electrode.

• If necessary, use the arrow keys to select a different buffer value.

• The hourglass tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer value, the CFM tag appears. Press the CFM key to confirm.

• The calibrated value is then displayed on the primary

LCD, while the secondary display will show the fourth expected buffer value.

• After the third calibration point is confirmed, immerse the pH electrode and the temperature probe approximately 4 cm into the fourth buffer solution and stir

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gently. The temperature probe should be close to the pH electrode.

• If necessary, use the arrow keys to select a different buffer value.

• The hourglass tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer value, the CFM tag appears. Press the CFM key to confirm.

• The calibrated value is then displayed on the primary

LCD, while the secondary display will show the fifth expected buffer value.

• After the fourth calibration point is confirmed, immerse pH electrode and temperature probe approximately 4 cm into the fifth buffer solution and stir gently. The temperature probe should be close to the pH electrode.

• If necessary, use the arrow keys to select a different buffer value.

• The hourglass tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer value, the CFM tag appears. Press the CFM key to confirm.

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• The instruments store the calibration values and return to normal measurement mode.

FOUR, THREE, or TWO-POINT PROCEDURE

Proceed as described in the “Five-point calibration” section and press CAL after the appropriate accepted calibration point. The instrument will memorize the calibration data and return to normal measurement mode.

ONE-POINT CALIBRATION

• Two setup options are available: “Pnt” and “OFFS”.

• If the “Pnt” option is selected, the adjacent slopes will be reevaluated.

• If the “OFFS” option is selected, an electrode offset correction is performed keeping unchanged the existing slopes.

• Proceed as described in the “Five-point calibration” section and press CAL after the first accepted calibration point. The instrument will memorize the single point calibration data and return to normal measurement mode.

26

Notes:

• During calibration press RANGE or the right or left arrow keys to toggle between pH buffer and temperature reading on the secondary LCD.

• Each time a buffer is confirmed, the new calibration parameters replace the old data of the corresponding buffer.

• If current confirmed buffer has no correspondence in the stored calibration, it will be added to the existing calibration data. If the stored calibration is a five-point procedure, the instrument will ask which buffer should be replaced.

Use the arrow keys to select the buffer to be replaced, then press CFM to confirm or CAL to exit calibration without replacing.

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CUSTOM BUFFERS

If at least one custom buffer was set in SETUP menu, it can be selected for calibration using the arrow keys.

Press SHIFT and then SETUP key if you want to adjust the buffer value. The buffer value, displayed on the secondary LCD, will start blinking.

Use the ARROW keys to change the buffer value.

After about 5 seconds the last change has been performed, the buffer value is updated and the meter exit from the changing mode. Press SHIFT and then SETUP key if you want to change again the value.

Note: Custom buffer value can be adjusted in a ±1.00

pH window, around the set value.

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CLEAR CALIBRATION

If the CLEAR key is pressed at any time during calibration, the “CLEAR CAL” tag lights up and the

“donE” message is displayed on the secondary LCD.

All previous calibrations are cleared and the instrument continues the procedure. The points already confirmed for the current calibration are not deleted.

Note: If CLEAR is pressed during the first calibration

point, the instrument returns to measurement mode.

RELATIVE mV CALIBRATION

• Press CAL from relative mV measurement mode.

The relative mV value is displayed on the primary LCD and the absolute mV value on the secondary LCD.

• If desired, change the displayed relative mV value using the arrow or the numerical keys (press NUM

LOCK to activate them).

Notes:

• Press RANGE to change the resolution of the displayed value, if possible (e.g. 199.9 will change to 1999, while 19.9 will not change).

• If CLEAR is pressed outside NUM LOCK mode, the displayed value is set to 0.0 mV.

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• Press NUM LOCK again to leave the numerical keys.

• When the reading is stable and the relative mV offset is within the offset window (±2000 mV), the CFM tag will be displayed.

• Press CFM to confirm relative mV calibration. The instrument will return to measurement mode.

• If the absolute mV reading is out of range or the relative mV offset is outside the offset window, the

WRONG tag will blink. To complete the calibration procedure the input value or the relative mV offset has to be changed.

ISE CALIBRATION (AD 1020 only)

For greatest accuracy, it is recommended to calibrate the instrument frequently.

Due to electrode conditioning time, keep the electrode immersed for a few seconds in the solution to be tested.

To make the calibration a simple and error-free procedure, the user will be guided step by step during calibration with easy messages on the display.

30

PREPARATION

• Set the proper ion charge through the setup item

“IonCG”.

Note: If the “undF” option is selected in setup menu, the calibration must be a two-point procedure.

If the user try to exit the calibration mode after confirming the first point, the “----” message appears on the LCD.

• Pour small quantities of the standard solutions into clean beakers. If possible, use plastic beakers to minimize any EMC interferences.

• For accurate calibration and to minimize cross-contamination, use two beakers for each standard solution, the first one for rinsing the electrode and the second for calibration.

PROCEDURE

One and two-point procedures are available, with five memorized standard solutions: 0.1, 1.0, 10, 100, 1000 ppm.

• Press RANGE to enter the ISE mode.

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TWO-POINT CALIBRATION

• Immerse the ISE electrode approximately 4 cm into the first standard solution and stir gently.

• Press CAL key. The primary LCD will display the ppm value using current offset and slope.

• The “CAL” and “Cal Point 1” tags light up, and the

0.1 ppm standard value is shown on the secondary

LCD.

• If necessary, use the arrow keys to select a different standard solution.

• The hourglass symbol will blink on the LCD until the reading becomes stable.

• When the reading is stable and close to the selected standard, the CFM tag starts blinking.

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• Press CFM to confirm calibration.

• The calibrated value will be displayed on the primary LCD and the second expected standard solution on the secondary LCD.

Note: The instrument will automatically skip the stan-

dard value used for the first point.

• After the first calibration point is confirmed, immerse the ISE electrode approximately 4 cm into the second standard solution.

• If necessary, use the arrow keys to select a different standard solution.

• The hourglass symbol will blink on the LCD until the reading becomes stable.

• When the reading is stable and close to the selected standard, the CFM tag starts blinking.

• Press CFM key to confirm calibration. The instrument stores the calibration data and returns to normal measurement mode.

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Notes:

• If the mV value is out of the ±2000 mV range, the “WRONG” and “BUFFER” tags are displayed. Check if the correct standard has been used, or refresh the electrode by following the maintenance procedure described on page 69.

If necessary, change the standard solution or the electrode.

• If the ion charge is not specified (“undF” selected in setup menu), the slope window is between ±20 mV and ±105 mV. If a ion charge value is set, the slope value is between 50% and

120% of the default slope for the corresponding ion charge.

Default slope value (mV/decade):

-59.16 (monovalent anion) - ion charge is -1

59.16 (monovalent cation) - ion charge is 1

-29.58 (divalent anion) - ion charge is -2

29.58 (divalent cation) - ion charge is 2

100 - ion charge is “undF”

• To reset to the default values and clear calibration data, press the CLEAR key during calibration. The instrument will display the “CLR” message and return to measurement mode.

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ONE-POINT CALIBRATION

• To perform a single point calibration, press CAL after the first calibration point has been confirmed.

The instrument will store the one-point calibration data and return to normal measurement mode.

GLP (GOOD LABORATORY PRACTICE)

GLP is a set of functions that allows data storage (and retrieval) about the electrode status and maintenance.

All data regarding pH, relative mV and ISE calibrations are stored in the instrument memory.

CALIBRATION TIME-OUT ALARM

The instrument allows to set the number of days (from

1 to 7) before the next required pH calibration. The default setting is “OFF” (disabled).

At start-up the instrument checks if the calibration timeout has expired. If yes, the “CAL DUE” message blinks to advise the user that a new calibration is required.

Note: If the instrument was not calibrated or all cali-

bration data were cleared, the “CAL DUE” message is displayed even if the feature is disabled in the setup menu.

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LAST pH CALIBRATION DATA

The last pH calibration data are stored automatically after a successful calibration.

To view the pH calibration data, from pH measurement mode press SHIFT and then GLP key. The instrument will display the date (yyyy.mm.dd) of the last calibration.

Use the up arrow key to view all calibration parameters in the following sequence:

• Time (hh:mm) of the last calibration.

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• pH calibration offset value.

• pH calibration slope (the GLP slope is the average of the calibration slopes; the percentage is referred to the ideal value of 59.16 mV/pH).

• Calibration buffers in the order used for calibration, together with the corresponding warnings.

37

Notes:

• The “OLd” message displayed beside a buffer value means that this buffer was not used during last calibration. Press SHIFT and then

SETUP key to see the old calibration date (or time, if old calibration date is the same as the last procedure).

• Each buffer is displayed with the resolution used during calibration.

• The “no bUF” message means that calibration was performed at less than five points.

• Calibration time-out alarm status. The display shows

“OFF” if the feature is disabled, or the days remaining before the calibration alarm will be activated

(e.g. 5 days), or after the calibration is expired (e.g.

-3 days).

• The instrument ID.

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LAST ISE CALIBRATION DATA (AD 1020 only)

Last ISE calibration data are stored automatically after a successful calibration.

To view the ISE calibration data, from ISE measurement mode press SHIFT and then GLP key. The instrument will display the date (yyyy.mm.dd) of last calibration.

Use the up arrow key to view all logged calibration parameters in the following sequence:

• ISE calibration time as in pH GLP mode.

• ISE calibration slope (mV/decade) on the primary LCD and ion charge on the secondary LCD.

• First ISE calibration buffer on the primary LCD and corresponding mV value on the secondary LCD.

39

• Second ISE calibration buffer on the primary LCD and corresponding mV value on the secondary LCD.

Notes:

• If a single point calibration is performed after a two-point calibration, the instrument will keep the old slope.

• The “no bUF” message means that calibration was performed at one point.

• The instrument ID as in pH GLP mode.

LAST RELATIVE mV CALIBRATION DATA

Last relative mV calibration data are stored automatically after a successful calibration.

To view the relative mV calibration data, from relative mV measurement mode press SHIFT and then GLP key.

The instrument will display the date (yyyy.mm.dd) of the last calibration.

40

Use the up arrow key to view all logged calibration parameters in the following sequence:

• Relative mV calibration offset and time (hh:mm) as in pH GLP mode.

• Instrument ID as in pH GLP mode.

Notes:

• Press SHIFT and then GLP key at any moment to return to normal measurement mode.

• If calibration has not been performed, the “no

CAL” message will blink on the LCD.

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SETUP

Setup mode allows viewing and modifying the following parameters:

• Calibration time-out alarm

• One-point calibration behavior

• Custom buffer 1

• Custom buffer 2

• Ion charge (AD1020 only)

• Alarm high limit

• Alarm low limit

• Start condition of automatic logging

• End condition of automatic logging

• Logging interval

• Temperature measure unit

• Current date (yyyy.mm.dd)

• Current time (hh:mm)

• Printer status

• Keyboard beep status

• Baud rate for serial communication

• Command prefix for serial communication

• Instrument ID

42

• To enter SETUP mode, from measurement mode press

SHIFT and then SETUP.

• Press CAL to change the item value. The selected item (e.g.

hour, while setting the time) and “CFM” tag will blink.

• Use the arrow keys to scroll the available values or insert the desired value with the numerical keys.

Note: To activate the numerical keys, press NUM

LOCK. The SHIFT tag will blink. The new introduced digit is always the last one and all previous digits will shift to left.

• To delete the digits press CLEAR key before entering the NUM LOCK mode.

• If another item has to be set

(e.g. minutes), press RANGE or left/right arrow key, and the item will start blinking.

• Use the arrow keys to scroll the available values or insert the desired value with the numerical keys.

• Press CFM to confirm or CAL to escape.

• Use the arrow keys to select the next/previous parameter.

43

• Press SHIFT and then SETUP to exit the setup menu at any time.

• When the printer status is “ON”, the instrument asks for printing a setup report. Press CFM to print the report or CAL to return the normal measurement mode.

The table on next page lists all available setup parameters, their valid values and the factory settings (default).

44

Item

CAL DUE

1 Pnt

Custom C1

Custom C2

IonCG

AL.HI

Description

Alarm time-out

1-point cal. behavior

Custom buffer 1

Custom buffer 2

Ion charge

Alarm high limit

AL.LO

Strt

End

Interval tEMP

Date

Time bEEP bAUd

PrEF

In Id

Alarm low limit

AutoLOG start condition

AutoLOG end condition

AutoLOG interval

Temperature unit

Date (yyyy.mm.dd)

Time (hh:mm)

Printer status

Beep status

Baud rate

Command prefix

Instrument ID

Valid values Default

OFF or 1 to 7 days OFF

Pnt, OFFS

-2.00 to 16.00 pH

Pnt

no

-2.00 to 16.00 pH undF, -2, -1, 1, 2 pH, mV, Rel mV ranges pH, mV, Rel mV ranges

See time/date or btn dur, SAMP, rdG

no

undF

no

no

btn

dur

5 sec to 180 min

°C, °F

2000.01.01

to 2099.12.31

00:00 to 23:59

ON, OFF

ON, OFF

600, 1200, 2400,

4800, 9600

0 to 47

0000 to 9999

5 sec

°C

OFF

OFF

2400

16

0000

45

Notes:

• The custom buffers can be set only with 0.001

resolution. If 0.01 pH resolution is selected during calibration, the displayed custom buffer value will be a rounded one.

• While in setup changing mode for items calibration alarm time-out, custom buffer, alarm limits, start and stop condition, press CLEAR to set the selected item to the default value.

• Refer to the table below to select the correct ion charge for each ion type (AD 1020 only):

ION CHARGE ION TYPE

-2 (divalent anion) S, CO

3

-1 (monovalent anion) F, Cl, Br, I, CN, SCN, ClO

4

, NO

3

+1 (monovalent cation)

+2 (divalent cation)

H, Na, K, Ag, NH

4

Mg, Ca, Ba, Cd, Cu, Pb undf undefined ion

46

ALARM SETUP

• Select one of the alarm items. The displayed value will be the one previously set.

• Press RANGE to select the range for the alarm and the corresponding range tag will blink.

• Press the CAL key to enter setup changing mode. Set the new value using the arrow or the numerical keys.

Notes:

• While in setup changing mode, press RANGE to select a different resolution, if possible (e.g.

if 199.9 is displayed, by pressing RANGE the value will change to 1999; if 19.9 is displayed, nothing will happen if pressing RANGE).

• Pressing CLEAR key, the displayed item will be reset to the default value (“no”).

• Press NUM LOCK key to activate the numerical keys. The SHIFT tag will blink.

• Press CFM to confirm the set value.

While in normal measurement mode:

• If only the “AL.LO” item is set, the instrument will beep when the reading is below alarm low limit.

• If only the “AL.HI” item is set, the instrument will beep when the reading is above alarm high limit.

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• If both alarm items are set, the instrument will beep when the reading is above alarm high limit or below alarm low threshold.

Note: If the “AL.HI” value is minor than or equal to

the “AL.LO” value, the WRONG tag will blink.

AutoLOG SETUP

AutoLOG Start Condition

• Select the ‘Strt’ item. The previously set automatic logging start condition will be displayed. The default value is ‘btn’ (button), i.e. start with key pressed.

• To view the set date, press and hold the RANGE key while in setup viewing mode, when time is displayed.

• If the CAL key is pressed while in setup viewing mode, the start time is displayed.

Note: Pressing CLEAR while in setup changing mode,

the start condition will be reset to the default value (“btn”).

AutoLOG End Condition

• Select the “End” item. The previously set automatic logging end condition will be displayed. The following options will be available: “dur” (duration), “SAMP”

(sample number), “rdG” (reading limit).

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• Pressing RANGE while in setup viewing mode, the instrument will display one of the following options:

“dur”, “SAMP’, “rdG” & “pH”, “rdG”& “mV”, “rdG”

& “Rel mV” and “rdG” & “ppm”.

• Press the CAL key and the instrument will enter the setup changing mode and display one of the following messages:

• “dur” on the secondary LCD and the duration value

(hh:mm) on the primary LCD, together with the

“TIME” tag. The duration can be set from 1 minute to 199 hours and 59 minutes.

• “SAMP” on the secondary LCD and the sample number on the primary LCD.

• “rdG” on the secondary LCD and the last set limit value on the primary LCD, with the corresponding range tag blinking.

To set a different resolution, press RANGE while in setup changing mode.

The automatic logging will start accordingly with the selected option for the “Strt” item: by pressing INTVLOG if the selected option is “btn” (button), or when the set starting time is reached.

The automatic logging will stop accordingly with the selected option for the “End” item or when INTVLOG key is pressed.

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LOGGING / STORING

This feature allows the user to log automatically pH &

Rel mV or ISE & Rel mV measurements, together with the temperature reading. All logged data can be transferred to a PC through the USB port.

The maximum logging space is 1000 record locations

(samples). This can be divided from 1 up to 50 lots (one lot can use all the free space). The lot ID can be from 1 to 99 (after 99 it restarts from 1). A maximum of 50 lots can be stored, even if there is free space available.

Note: When the logged lots are more than one, the to-

tal number of samples can be less than 1000, because the logging memory is divided in pages of 20 samples each.

The logging interval can be set from 5 seconds to 180 minutes (see “Setup” section for details). Up to 50 record locations are also provided for the log-on-demand.

LOG-ON-DEMAND

(LOGGING/STORING THE CURRENT DATA)

To store the current reading into the instrument memory, press STORE from normal measurement mode.

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The instrument will display the current date on the primary LCD and the record number on the secondary

LCD, together with the ‘LOG’ tag blinking for a few seconds. Then the number of free locations is shown.

If there are less than 6 memory locations left, the record number and the “Lo” message will blink for a few seconds to alert the user, and then the number of free locations is displayed.

If the logging space is full, the “FULL LOC” message will be displayed for a few seconds together with the

“LOG” tag blinking, followed by the “FrEE 0” message.

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The instrument returns to normal measurement mode.

AUTOMATIC LOGGING

The user-selectable automatic logging options make these instruments very useful in a wide range of applications.

• Start pressing the INTVLOG key or set starting time/ date. Stop after a set duration.

• Start pressing the INTVLOG key or set starting time/ date. Stop when a set value is reached.

• Start pressing the INTVLOG key or set starting time/ date. Stop when a set sample number is reached.

When the automatic logging starts, the instrument will display for a few seconds the lot number and the auto-log interval, together with the “AutoLOG” tag.

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Notes:

• For different automatic logging modes, the logging starts/stops automatically after the set start/ stop condition is reached.

• The “AutoLOG” tag will blink if one of these modes is selected and the start condition is not reached.

After the data logging is started, the current value is displayed on the primary LCD and the temperature on the secondary LCD, together with the “AutoLOG” tag.

To stop the automatic logging, press the INTVLOG key at any time. The instrument will display for a few seconds the lot number, the sample number and the

“AutoLOG” tag, and then it will return to normal measurement mode.

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Notes:

• If printer is ON and the logging interval is at least

30 seconds, each logged sample is printed.

• If the pages for automatic logging are full, the

“FULL LOC” message is displayed, as in logon-demand mode.

VIEWING LOGGED DATA

To retrieve stored information, press MEM RCL from normal measurement mode. If no data were logged, the display will show the “no rEC” message.

Otherwise, the instrument displays the memorized pH,

Rel mV or ppm reading, and the lot number.

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Pressing SHIFT and then SETUP key while in MEM

RCL mode, the secondary LCD will toggle between the lot and the record number. Use the arrow keys to select a different lot or record.

Press RANGE or the right arrow key to scroll all logged parameters, displayed as shown in the table below:

Parameter Primary LCD Secondary LCD

mV

TIME

DATE

OFFSET

SLOPE mV reading Temperature

Hour and minutes Seconds

Year Month and day

Offset value

Slope value

Lot or record number

Lot number or ion charge (ISE range)

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Notes:

• To view the previous logged parameter, press the left arrow key.

• In Rel mV MEM RCL mode the offset value is not available and the display shows ‘----’.

• The record number is an identification number inside a lot.

After scrolling all logged parameters, the meter displays the “dEL” message together with the lot number.

Notes:

• Pressing SHIFT and then SETUP key, the instrument toggles between lot and record number (log-on-demand only) or all lots.

• The “LdM” message on the secondary LCD indicates that data has been stored in log-on-demand mode.

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• Press CLEAR to delete the selected lot/record or all lots.

Note: Positions remain free in the log-on-demand lot

by deleting the last logged sample or all lots.

• If the “dEL All” option was selected, all logged data are deleted and the instrument returns to normal measurement mode.

• Press MEM RCL at any time to return to measurement mode.

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HOLD

To freeze a stable reading on the LCD, press HOLD key from normal measurement mode.

The “Auto” and “H” tags will blink on the LCD until the reading stabilizes.

When the reading is stable, the “Auto” and “H” tags stop blinking and the reading is frozen.

Press HOLD key again to return the normal measurement mode.

Note: Pressing RANGE the instrument will skip to the

displayed range, without leaving the HOLD mode. The STORE key also holds HOLD mode.

Pressing MEM RCL key, SHIFT and then

SETUP or GLP, the instrument leaves the HOLD mode and performs the selected function.

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PRINTING

When connected to an external serial printer, a complete set of information can be printed.

Printer specifications:

• at least 16 characters / line

• baud rate 9600

•

9-pin RS232 input

Data can be printed on demand (from measurement, GLP and SETUP modes) by pressing PRINT key or automatically (from automatic logging and log-on-demand modes).

Automatic data printing from automatic logging mode can be done only if the automatic logging interval is greater than 30 seconds and the printer status is set to ON.

Note: To cancel printing, press PRINT again.

While in pH measurement mode, the printout provides the following information:

Date 2004/01/01

Time 02:25:17 pH 7.01

mV -23.2

°

C 26.3

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Note: For ISE (AD1020 only) and relative mV mea-

surement modes, the ppm and Rel.mV values will be printed.

When in GLP mode, the printout provide the following information:

GLP pH

• For pH range:

Instr ID 0003

Date 2004/01/01

Time 01:04:32

Cal Time Out OFF

Offset -22.9mV

Slope 100.0%

C a l B u f f e r s : pH 7.01

• For relative mV range:

GLP Rel mV

Instr ID 0003

Date 2004/01/01

Time 02:27:35

C h a n n e l p H

Off.RelmV -23.3

•

For ISE range

(AD1020 only):

GLP Ion

Instr ID 0003

Date 2004/01/03

Time 02:30:04

Slope -59.3

Ion Charge 1

C a l B u f f e r s ppm 0.1

mV -320.6

ppm 100 mV -158.4

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When in SETUP mode, the following information can be printed:

• If PRINT is the first key pressed after entering the setup mode, a setup table of contents will be printed.

INSTRUMENT SETUP

Calibration

Alarm Time Out

One point cal

behavior pH Custom Buf. 1 pH Custom Buf. 2

Ion Charge

Beep Alarms:

Alarm high

Alarm low

AutoLOG:

Start condition

End condition

Interval

Temperature unit

Current Date

Current Time

Printer ON/OFF

Beep ON/OFF

Baud rate

Command prefix

Instrument ID

Active Keys:

^

-next item v -prev. item

CAL-enter in

modifying mode

SET-exit SETUP

RANGE-select

parameter

See also items

H e l p p r i n t i n g s

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• When exiting the setup mode, the instrument asks if the setup report has to be printed. The “Prn” message will be displayed, together with the printer symbol ( ) and the CFM tag blinking.

• Press CFM to print the setup report or CAL to exit without printing.

SETUP REPORT

Instr ID 0003

Cal Time Out OFF

One Cal Point

pnt

Custom Buffer pH 3.000

Cb2 Not defined

Ion Charge undf

Date 2004/01/01

Time 02:28:34

Printer ON

Beep OFF

Baud Rate 2400

Comm prefix 16

ALARM HIGH LIMIT pH no mV no

Rel mV no ppm no

ALARM LOW LIMIT pH no mV no ppm no

Temperature

°

C

AUTO-LOG:

Interval 000:05

START Condition:

btn-button

STOP Condition:

Duration: 03:00

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From setup mode, if CAL and then

PRINT is pressed for a chosen parameter, a help printout will provide the following information (e.g.

Alarm Time-Out):

SET

ALARM TIME-OUT

(OFF or 1-7)

Active Keys:

^ -increment v -decrement

CAL-exit, no save

CFM-save & exit

CLR-set to

default

During logging, an automatic printout will provide the following information for pH, mV and ISE

(AD1020 only), log-on-demand and automatic logging modes:

LOG ON DEMAND

Instr ID 0003

Date 2004/01/01

Time 01:13:53

Sample No 1 pH 7.01

mV -23.3

°

C 26.2

Offset -22.9mV

Slope 100.0%

START AUTOLOG

Instr ID 0002

Lot L03

Date 2004/10/15

Time 18:05:01

Interval 00:30

Slope 99.7%

Sample No 1 pH 7.02

mV -0.5

°

C 25.0

Sample No 2 pH 7.01

mV -0.2

°

C 25.0

Sample No 3 pH 6.97

mV 1.9

°

C 24.9

STOP AUTOLOG

Date 2004/10/15

Time 18:06:51

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TEMPERATURE CALIBRATION

(for technical personnel only)

The instruments are factory calibrated for temperature.

Adwa’s temperature probes are interchangeable and no temperature calibration is needed when they are replaced.

If temperature measurements are not accurate, temperature new calibration should be performed.

For an accurate recalibration, contact your dealer or the nearest Adwa Customer Service Center, or follow the instructions below.

• Prepare a vessel containing ice and water, and another one containing hot water at approximately 50°C

(122°F). Place insulation material around the vessels to minimize temperature drift.

• Use a calibrated thermometer with a resolution of 0.1°C

(or 0.1°F) as reference thermometer. Connect the supplied

AD7662

temperature probe to the appropriate socket on the rear panel.

• With the instrument off, press and hold the CAL & up arrow keys, then power on the instrument. The “CAL” tag lights up and the secondary LCD shows 0.0°C (or

32.0°F). The primary LCD will display the measured temperature or “----”, if the reading is out of range.

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• Immerse the temperature probe into the vessel with ice and water as close as possible to the reference thermometer. Allow a few seconds for probe thermal stabilization.

• Use the arrow keys to set the reading on the secondary LCD to that measured by the reference thermometer.

• When the reading is stable and close to the selected calibration point, the CFM tag starts blinking.

• Press CFM to confirm. The secondary

LCD will display 50.0°C (or 122.0°F).

• Immerse the temperature probe into the second vessel as close as possible to the reference thermometer.

Allow a few seconds for probe thermal stabilization.

• Use the arrow keys to set the reading on the secondary LCD to that of the hot water measured by the reference thermometer.

• When the reading is stable and close to the selected calibration point, the CFM tag starts blinking.

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• Press CFM to confirm. The instrument returns to normal measurement mode.

Note: If the reading is not close to the selected cali-

bration point, the WRONG tag will blink. Change the temperature probe and restart calibration.

mV CALIBRATION

(for technical personnel only)

The instruments are factory calibrated for mV range.

Adwa’s ORP electrodes are interchangeable and no mV calibration is needed when they are replaced.

If measurements are not accurate, a mV recalibration should be performed.

For an accurate recalibration, contact your dealer or the nearest Adwa Customer Service Center, or follow the instructions below.

A two or three-point procedure can be performed at 0.0,

600.0 and 1800.0 mV.

• Attach a mV simulator with an accuracy of ±0.1 mV to the BNC connector on the rear panel.

• With the instrument off, press and hold the CFM &

STORE keys, then power on the instrument.

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The CAL tag lights up and the secondary LCD shows

0.0 mV.

• Set the simulator to 0.0 mV. When the reading is stable and close to the selected calibration point, the CFM tag starts blinking.

• Press CFM to confirm and the secondary LCD will display the second expected value (600.0 mV).

• Set the simulator to 600.0 mV. When the reading is stable and close to the selected calibration point, the

CFM tag starts blinking.

• Press CFM to confirm. The secondary LCD will display the third expected value (1800 mV).

• Set the simulator to 1800.0 mV. When the reading is stable and close to the selected calibration point, the

CFM tag starts blinking.

• Press CFM to confirm. The instrument returns to measurement mode.

Notes:

• If the reading is not close to the selected point, the WRONG tag will blink. Verify the calibration conditions or contact your dealer if calibration can not be performed.

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• To return to normal measurement mode, press

CAL at any moment during calibration.

• If the calibration procedure is ended after the

600.0 mV point is confirmed, the meter returns to normal measurement mode and stores a 2point calibration data.

ANALOG OUTPUT

For the full range of each measurement, the analog output varies from - 2000 to 2000 mV.

PC INTERFACE

Data transmission from the instrument to the PC can be done with the AD9316 Windows

®

compatible software

(optional). AD9316 also offers graphing and on-line help feature.

Data can be exported to the most popular spreadsheet programs for further analysis.

To connect your instrument to a PC, use a standard USB cable. Make sure that the instrument is switched off and plug the cable to the instrument USB port and to the PC

USB port.

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pH ELECTRODE CONDITIONING &

MAINTENANCE

PREPARATION PROCEDURE

Remove the pH electrode protective cap. DO NOT BE

ALARMED IF SALT DEPOSITS ARE PRESENT.

This is normal with electrodes and they will disappear when rinsed with water.

During transport, tiny bubbles of air may form inside the glass bulb affecting proper functioning of the electrode.

These bubbles can be removed by “shaking down” the electrode as you would do with a glass thermometer.

If the bulb and/or junction are dry, soak the electrode in

A7082 electrolyte solution for at least one hour.

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For refillable electrodes:

If the filling solution (electrolyte) is more than 2.5 cm below the fill hole, add AD7082 electrolyte solution.

For faster response, unscrew the fill hole screw during measurements.

STORAGE PROCEDURE

To minimize clogging and assure a quick response time, the glass bulb and the junction of the pH electrode should be kept moist and not allowed to dry out.

Replace the solution in the protective cap with a few drops of AD70300 storage solution.

NEVER STORE THE ELECTRODE IN DISTILLED

OR DEIONIZED WATER.

PERIODIC MAINTENANCE

Inspect electrode and cable. The cable used for connection to the instrument must be intact and there must be no points of broken insulation on the cable or cracks on the electrode stem or bulb. Connectors must be perfectly clean and dry. If any scratches or cracks are present, replace the electrode. Rinse off any salt deposits with water.

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For refillable electrodes:

Refill the electrode reference chamber with fresh

AD7082 electrolyte solution. Allow the electrode to

stand upright for 1 hour. Follow the storage procedure above.

CLEANING PROCEDURE

Soak in deionized water for approximately 30 minutes.

IMPORTANT: After performing any of the cleaning

procedures, rinse the electrode thoroughly with deionized water, refill the reference chamber with fresh electrolyte and soak the electrode in AD70300 storage solution for at least 1 hour before taking measurements.

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TROUBLESHOOTING GUIDE

SYMPTOMS

Slow response/ excessive drift.

Reading fluctuate up and down (noise).

The display shows blinking dashes during pH measurements.

The display shows blinking reading during measurements.

Out of range in the mV scale.

PROBLEM

Dirty pH electrode.

Clogged/dirty junction. Low electrolyte level

(refillable electrodes only).

Out of range in pH scale.

Reading out of range or electrode not connected.

SOLUTION

Soak the electrode tip in deionized water solution for 30 minutes and then follow the cleaning procedure.

Clean the electrode.

Refill with fresh electrolyte (refillable electrodes only).

Make sure the pH sample is in the specified range.

Calibrate. Check the electrolyte level and the general state of the pH electrode.

Check sample or connect electrode.

Dry membrane/dry junction.

Soak in AD70300 storage solution for at least one hour.

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SYMPTOMS

The meter does not work with the temperature probe.

The meter fails to calibrate or gives faulty readings.

Explicit warnings are displayed during pH calibration.

At start-up the meter displays all

LCD permanently.

Long beep heard when pressing a key.

Digits can not be introduced with the numeric keys.

“Err xx” error message displayed.

PROBLEM

Out of order temperature probe.

SOLUTION

Replace the probe.

Broken or out of order pH electrode.

Replace the electrode.

Dirty/broken pH electrode, contaminated reference or buffers.

One of the keys is blocked.

Follow displayed instructions.

Key without function in current mode. End of range reached with the

ARROW keys.

Max. value reached for corresponding range.

Internal error.

Check the keyboard or contact the vendor.

Don’t press keys without function in current mode.

Delete digits.

Turn off the meter and then turn on.

If the error persist, contact the dealer.

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ELECTRODES, PROBES AND SOLUTIONS

AD1131B

AD1230B

AD3230B

AD7662

AD70004P

AD70007P

AD70010P

Refillable pH electrode with glass body, tip protection bottle, BNC connector and 1 m cable pH electrode with Epoxy body, tip protection bottle, BNC connector and 1 m cable

ORP electrode with Epoxy body, tip protection bottle, BNC connector and

1 m cable

Stainless steel temperature probe with

1 m cable.

pH 4.01 buffer, 20 ml sachet, 25 pcs pH 7.01 buffer, 20 ml sachet, 25 pcs pH 10.01 buffer, 20 ml sachet, 25 pcs

AD70000P

Rinse solution, 20 ml sachet, 25 pcs.

AD7004

pH 4.01 buffer solution, 230 ml bottle

AD7007

pH 7.01 buffer solution, 230 ml bottle

AD70010P

pH 10.01 buffer solution, 20 ml sachet,

AD7000

AD7082

AD70300

25 pcs.

Rinse solution, 230 ml bottle

Refilling solution, 3.5M KCl, 4x30 ml

Storage solution, 230 ml

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ADWA INSTRUMENTS Kft.

Alsókikötõ sor 11, 6726 Szeged, Hungary

Tel. +36 62 317 878

Fax +36 62 550 610

e-mail: [email protected]

www.adwainstruments.com

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MANAD1000 09/14